Browsing Institutt for kjemisk prosessteknologi by Title
Now showing items 1060-1079 of 1775
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Modelling and Simulation of a Two-Stage Refrigeration Cycle
(Master thesis, 2015)A two-stage refrigeration cycle was modelled and optimized in MATLAB. The optimum was found to be very flat, resulting in small losses from disturbances and implementation errors. The two unconstrained degrees of freedom ... -
Modelling and simulation of chemical looping combustion in a double loop circulating fluidized bed reactor system
(Doctoral theses at NTNU;2018:109, Doctoral thesis, 2018)Among the well-known combustion technologies with CO2 capture, Chemical Looping Combustion (CLC) stands out for its potential higher energy efficiency. CLC involves combustion of carbonaceous fuel such as natural gas or ... -
Modelling and simulation of chemical looping combustion process in a double loop circulating fluidized bed reactor
(Journal article, 2017)A reactive CFD model has been developed and implemented numerically in an in-house code for a coupled double loop circulation fluidized bed reactor. In the current work it is utilized for the chemical looping combustion ... -
Modelling and simulation of hydrodynamics in double loop circulating fluidizedbed reactor for chemical looping combustion process
(Journal article, 2017)A multiphase CFD model has been developed and implemented in an in-house code for a coupled double loop circulation fluidized bed (DLCFB) reactor which can be utilized for the chemical looping combustion process. The air ... -
Modelling and simulation of reactive gas-solid flows in circulating fluidized bed reactors
(Doctoral thesis at NTNU;2014:368, Doctoral thesis, 2014)The thesis presents a study on mathematical modelling and numerical simulation of reactive gas-solid flows operating in circulating fluidized bed (CFB) reactors, in particular environmentally-friendly methane reforming ... -
Modelling CO2 - water mixture thermodynamics using various equations of state (EoSs) with emphasis on the potential of the SPUNG EoS
(Journal article; Peer reviewed, 2014)CO2–water is a very important mixture in the Carbon Capture and Storage (CCS) industry. The mixture can have a broad range of concentrations, from water as an impurity in CO2 transport to high water concentrations in ... -
Modelling CO2 and H2S Solubility in Aqueous Solution of MDEA
(Master thesis, 2017)Raw natural gas contains acid gases like CO2 and H2S. These gases are important to remove for different reasons. CO2 leads to reduction in the heating value of a gas, reducing its selling value, and both CO2 and H2S may ... -
Modelling Failure Mechanisms in Subsea Equipment
(Master thesis, 2016)The oil and gas industry is recently facing a challenge to increase the efficiency and reduce the costs. One way to reduce costs is to better optimize the maintenance strategy. By applying failure mechanism models it could ... -
Modelling of a tubular membrane contactor for pre-combustion CO2 capture using ionic liquids: Influence of the membrane configuration, absorbent properties and operation parameters
(Journal article; Peer reviewed, 2016)A membrane contactor using ionic liquids (ILs) as solvent for pre-combustion capture CO2 at elevated temperature (303–393 K) and pressure (20 bar) has been studied using mathematic model in the present work. A comprehensive ... -
Modelling of absorption of CO2 inaqueous solutions of alkanolamines
(Master thesis, 2009) -
Modelling of Composition and Growth of Aerosol Droplets in Absorption Columns
(Doctoral theses at NTNU;2017:348, Doctoral thesis, 2017)To meet future energy demand and at the same time reduce our carbon footprint are main challenges of the current era. The global CO2 concentration has been increasing since the beginning of the industrial revolution and ... -
Modelling of dehydration adsorption column at Statoil Kårstø
(Master thesis, 2013)In the master thesis project of spring 2013, the adsorption dehydration of natural gas on a bed of SylobeadTM Molecular Sieve Grade 564 adsorbent pellets was to be modelled in MATLAB 7.12.0 (R2011a). This process is a part ... -
Modelling of Gas Entrainment in Slugs through use of Simulations in StarCCM+ and Mechanistic Balance
(Master thesis, 2014)Slug flow is a flow pattern existing at intermediate flow rates, or arising due to operating conditions or pipe topology. Typical slug flow is recognized by large gas bubbles flowing over a liquid film separated by liquid ... -
Modelling of Subsurface Releases of Oil and Gas: Testing of a New Algorithm for Droplet Size Formation and Laboratory Verification
(Master thesis, 2013)The objective of the Master's thesis has been modelling of subsurface blowouts of oil and gas. The main objective was to the test a new algorithm for droplet size formation implemented into SINTEF's simulation tool ``Marine ... -
Modelling Solvent Degradation in Amine-based Post-combustion Carbon Capture
(Master thesis, 2021)Aminbasert karbonfangst er en teknologi som kan redusere de stadig større menneskeligskapte CO2-utslippene. Det er likevel to problemer med denne teknologien. For det første vil løsningsmiddelet som brukes for å reagere ... -
Modelling, Control, and Optimization of a Recirculating Aquaculture System
(Doctoral theses at NTNU;2023:336, Doctoral thesis, 2023)Recirculating aquaculture systems (RAS) are closed-loop systems that recycle most of the effluent of a fish tank after particle removal and water treatment. This type of process requires good control of the water quality, ... -
Modelling, estimation and optimization of the methanol synthesis with catalyst deactivation
(Doktoravhandlinger ved NTNU, 1503-8181; 2001:18, Doctoral thesis, 2001)This thesis studies dynamic modelling, estimation and optimization of the methanol synthesis with catalyst deactivation. Conversion of natural gas is of special interest in Norway for both economic and political reasons. ... -
Modified dolomite-based pellets synthesized by one-pot method for high-temperature CO2 capture
(Master thesis, 2021)Utslipp av CO2 grunnet menneskelig aktivitet er en av de største utfordringene verden står ovenfor i dag. Denne masteroppgaven er en del av et prosjekt hvor en MBCL (Moving Bed Carbonate Looping)-reaktor har blitt utviklet. ... -
Modifier adaptation for real-time optimization of a gas lifted well network
(Journal article; Peer reviewed, 2018)This work studies the steady-state optimization of a Gas Lift Oil Well Network. The optimization approach used is based on the methodology proposed by (Gao et al., 2016), which is a Modifier Adaptation (MA) with gradient ... -
MoDoop: An Automated Computational Approach for COSMO-RS Prediction of Biopolymer Solubilities in Ionic Liquids
(Journal article; Peer reviewed, 2019)An automated computational framework (MoDoop) was developed to predict the biopolymer solubilities in ionic liquids (ILs) on the basis of conductor-like screening model for real solvents calculations of two thermodynamic ...